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Where is the low side charging port on a 1996 Gran prix? Think it is low on refrigerant, but could not quickly locate the port. Is it buried or readily available?
Thanks, Marcel.
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You missed the correct port alright, that is the high side. You don't want to connect to the high side. That coupling on the refill kit you have will only fit on the low side. Those fill ports are usually covered with a plastic cap that looks like a tire valve cap to keep dirt out. There are two lines that come off the AC compressor, follow those back until you find the valves, the low side is the valve your quick connect will fit on.
Follow the ac lines from the ac compressor toward the firewall ,to the inside of the car,look at the large ac line,it will have the ac low side service port on it,it will be the only one you can hook up to with the one hose charge set up you have,it will not hook up to the wrong one so you can mess up,if there is anything else you need to know please let me know thank you ,and please rate.
The low pressure port is the only one that your AC charging tool will fit on if you are planning to charge the AC unit with refrigerant. The high side port is much larger and the quick connect tool won't fit it. Look up high toward the firewall on Fords and Lincolns.
The low side port. If you have the proper quick connect charging hose, it will only fit the low side fitting. The high side fitting is larger & wont fit the quick connect fitting on the hose.
LOW PRESSURE PORT HAS A BLUE CAP ON IT.MAKE SURE YOU ARE USING REFRIGERANT R-134 BLUE CHARGE HOSE.R-12 CHARGING HOSE WILL NOT FIT R-134 SYSTEMS.SEE YOUR CAR HAS R-134 REFRIGERANT SYSTEM. THE EARLY 90S CARS HAVE R-12 REFRIGERANT SYSTEM.YOU NEED R-134 CHARGE HOSE SET.
On that year a4 and a6 there is no low side charging port. (sucks) The way you charge those systems is by evacuating all of the refrigerant, then with the vehicle off, add the correct amount of refrigerant to the high side port (turning the compressor over by hand occasionally)
Did you check the acumulator? There is a port on it, that is the low side port. Keep in mind that if you have to recharge the system it is because other parts need service (leak in the syst) and whatever refrigerant you put in it will leak out again. The system may work temporarily or may work inefficiently. Also may sure that there is oil in syst.
Should be reciever/drier pass side undehood.will be fitting with black cap their.Attach to port with charge line .Must have engine running and compressor on.
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